Pencil lengthener and holder



Aug. 4, 1936. J. P. KUSA.

PENCIL LENGTHENER AND HOLDER Filed Oct. '7, 1953 2 Sheets-Sheet ll/vvs/vroe: JAMES R. KusA Qjmj 2) A TTOP Y.

Aug. 4, 1936. J. P. KUSA PENCIL LENGTHENER AND HOLDER- 2 Shets-Sheet 2Filed Oct. 7; 1933 lNvsA/roe: JAMES P. KUSA Arm/2N5! Patented Au 4, i936UNITED STATES PATENT OFFICE 2,049,810 maven. LENG AND noLnEa JamesBlues, Cleveland, Ohio Application October r, 1933. Serial No. 692,598

.flsom'ms. (elmo) This invention relates to pencil lengtheners andholders for holding short pieces of pencils inorde'r to provide agreater length 'of grip and greater ease of manipulation and also toprovide an en- 5 largedand more suitable grip for longer pencils.

As is well known, when a pencil is worn down to a relatively shortlength it ceases to be convenient for'use and it is necessary that theshort piece or m stub oi the pencil be mounted in a lengthener so as toprovide agrip of suitable length. It also frequently happens that, aftera pencil has been somewhat shortened by use, the writer desires to mountthe pencil in a holder in order toprovide 15 an enlarged or moresuitable grip. In many cases,

also, the writer or draftsman has a series of holders having easilyperceptible differences of form,

color or inscriptions which he uses selectively to hold pencils ofdifierent degrees of hardness, which are otherwise only distinguishableby close g examination of the lettering on the sheath of the pencil.

I am aware that lengtheners have been 'proobjectionable inward movementof the pencil caused by ordinary pressure in writing, and the 35gripping of the pencil is not sufllclently firm to prevent the rotary.movement of the pencil when sharpened in a mechanical sharpening device.

One object of this invention, therefore; is to produce an improvedpencil holder which will 40 more firmly grip and more rigidly hold thepencil than is possible with previously known holders.

A further object of this invention is to produce a pencil holder whichis adapted to' hold various 45 tion or. pencil and holder to be ofobjectionable length. v

A further object of this invention is to produce a pencil lengthener andholder which positively 50 grips the pencil andfrom which the pencil maybe axially extended as the pencil is used, thus maintaining asubstantially constant overall length ofpencil and holder.

A further object of this. invention is to produce 55 a pencil holder inwhich the pencil may be mountlengths of pencils, without causing thecombinaed very quickly with a slight rotary movement and with a minimumof effort. A further object of this invention is to produce a pencillengthener in which a pencil or stub of the usual standard polygonalcross sectional shape may be inserted in the holder to any desiredextent and may begripped in that position in the holder by a slightrotary motion.

. Afurther object of this invention is to produce a pencil lengthener ofthis type in which the penoil will not shift or twist when it is beingsharp wed in a mechanical pencil sharpener. A further object of thisinvention is to produce a pencil holder and'lengthener artistic inappearance, simple and economical in construction, and eflicient andcertain in operation.

For the accomplishment of the above and other objects, this inventioncomprises a pencil holder consisting'of a tube with-a generallycylindrical bore having an interior dimension adapted to slidably butsnugly receive a wood sheathed pencil of polygonal cross section, thetube being formed with one or more transverse inwardly directedindentations or projections which will not prevent the insertion of thepencil into the tube but which .25

are adapted, when the pencil is rotated, to impress themselves in theapex lines or ridges of the pencil whereby the pencil is prevented frommoving axially relatively to the tube.

A further feature of this invention is the provision of a stop,preferably formed by one or more longitudinal inwardly directedprojections which limit rotary movement of the pencil to a degree whichwill arrest the rotation of the pencil while the ridges are' inengagement with the transverse indentations.

' A more specific additional feature of this invention is the provisionof resilience and frictional resistance in association with thetransverse inwardly directed projections whereby a tendency of thepencil to be inadvertently released is prevented.

In the preferred embodiment of this invention the indentations are soshaped and disposed as to leave a polygonal opening having substantiallythe same shape' and size as the crosssection of the pencilfor which theholder is intendcylindrical tube and to supplement the resilience of thetube and to improve the artistic appearances of this novel holder and toenlarge its utility. I

Further and more specific objects of this invention will become apparentfrom the following description and claims. This description sets forthin detail certain devioes'embodying this invention, such discloseddevices constituting, however, but a few of the forms in which theprinciple of this invention may be applied- Referring to the annexeddrawings:

Fig. 1 is .a plan view of a preferred form of this improved holdergripping a pencil.

Fig. 2 is a side elevation of the parts shown in Fig. 1, a certaincasing element or sheath of the holder being shownpartly in section.

Fig. 3 is a complete axial section of this improved holder, this viewbeing taken in the plane indicated by line 3, 3 in Fig. 1 and the pencilinserts being shown in elevation- Fig. 4 is a view, partly in elevationand partly in axial section, illustrating a simplified form of thisimproved holder and showing a pencil gripped in the holder.

Fig. 5 illustrates this invention applied to the pencil arm of aninexpensive form of drafting compass.

Fig. 6 is an enlarged perspective view of the gripping portion of one ofthe tubular elements comprising a portion of the devices shown in thepreceding figures, and disclosing some of the important elements of thisinvention.

Fig. 7 is a view similar to Fig. 6 showing one of many alternatearrangements of the elements of the gripping'portion of the tubularelement comprised in my invention.

Fig. 8 is an enlarged transverse sectional view thru the holder andpencil at a point spaced fromthe gripping portion, this view being takenon the plane indicated by line I, 8 of Figures 2 and 3.

Fig. 9 is an enlarged transverse section thru the holder and penciltaken on the plane indicated by line I4, I in Figures 2 and 3, thisview, however, showing the pencil in slidable relation to the holder,this being the position in which the pencil is inserted in the holder.

Fig. 10 is a view similar to Fig. 9 but taken on the plane indicated byline I5, I5 in Figures 2 and 3, this view alsoshowing the pencil in thatangular position in the holder inwhich it is inserted into the holderand is slidable therein.

Fig. 11 is an. axial section thru the holder, this view being taken onthe plane by line I I, II in Fig. 12 is a view similar to Fig. 9 butshowing the pencil rotated about 30 degrees clockwise from 'itsinsertion position, as viewed in the drawings.

Fig. 13 is a view similar to Fig. 10 but also showing the pencil rotatedabout 30 degrees clockwise from its insertion position.

Fig. 14 is an enlarged view taken in the plane indicated by line I4, I4in Figures 2 and 3. this view corresponding with Figures. 9 and 12- butshowing the pencil securely gripped in the holder, having been rotatedabout 45 degrees clockwise from-the inserting position shown in Figure 9as viewed in the drawings.

Fig. 15 is a similarly enlarged view taken on the plane indicated byline I5, I5 in Figures 2 and 3,

this view corresponding with Figures 10 and 13 but showing the pencilrotated about 45 degrees from the insertingposition shown in Fig. 10 andbeing securely gripped in the holder.

seated in the usual ferrule 'I, on a pencil end 8,

Fig. 16 is an axial section thru the holder, this view being taken onthe plane indicated by line I6, It in Fig. 14.

Fig. 1'? is a view similar to Fig. 15 showing, however, a modified formof transverse pencil 5 gripping elements.

In reference to Figures 9 to 16 inclusive, it

should be noted that, in the broader aspects of .the specifications andclaimsand I desire not to be limited'in any respect by the use of oneterm or the other.

Referring first to the form of the invention 20 illustrated in Figures1,2, and 3, wherein I represents a pencil, mounted in one end of thisimproved holder by a novel gripping conformation to be hereinafterdescribed. The pencil is formed with a point 2 and a square upper end 3.The pencil I has a polygonal sheath having apex lines or ridges 4alternating with plane faces 5. As will appear, the lengthener or holderis preferably formed with a continuous opening extending therethroughand both ends are provided 30 with substantially identical grippingconformations. As a result of this provision a pencil may be mounted inboth ends of the holder or, as shown in the drawings, an eraser 6 may bemounted in the opposed end, this eraser being 3 such an eraser assemblyas might be reclaimed from an otherwise completely used pencil.

The lengthener or holder, in the embodiment illustrated in Figures 1, 2and 3 consists of an in-- ner substantially tubular member I 0 and anouter sheath or casing 20.

As best shown in Figures 6, and 8, 9, and 10, the tubular member I0 ispreferably made of thin gauge metal having a slight resiliency. Themember III is generally tubular in cross section and has a tubular boreII of substantially the 7 same inside diameter as the diameter of thecircle circumscribed about the ridges of the pencil I, but is providedwith a plurality of inwardly extending projections consisting ofinwardly forced indentations or teeth formed, in the illustratedembodiment, of metal of the tube. These inwardly projecting teethare-located preferably near one or both ends of the tube and are adaptedto grip the pencil I and/or pencil end 8. These projections are of twotypes: first, transversely extending projections or teeth I2 and second,longitudinally extending projections or tongues 60 The transverseprojections or teeth I2 are relatively narrow in the longitudinaldirection while the longitudinal tongues I3 are relatively narrow in thetransverse direction but extend a considerable distance longitudinallyof the tube.. The 5 transverse teeth I2 are so formed that their bottomsII form chords across the bore of the tube. It will further be notedthat the length of these bottom chords is substantially the same as thewidth of the faces of the pencil I and that, in the embodiment shown,the number of teeth I2 is the same as the number of faces on the penciland that these teeth are equally spaced around the bore of tube so thatthe constricted area 'aoeaaio stantially similar in size and shape tothe cross section of the pencil. It will be apparent that theprojections l2 substantially contact the faces of the pencil as clearlyseen in Figure 10. The constricted area at the teeth I2 is of a size toprovide a snug sliding fit for the insertion oi the pencil into thetube, when the pencil is properly angularly alined with the constrictedarea. As

will be evident from an inspection of the draw-' ings, these inwardlyextending projections form transverse fins or walls adjacent theperiphery These tongues l3 are circumferentially located' substantiallyat one end of the transverse teeth I I2 and intersect these teeth, asshown at the points l5, and extend on each side of the teeth i2 for asubstantial distance, as will appear from an inspection of Figures 2 and6.- The longitudinal tongues are formed with a relatively abrupt wallIt, extending in a nearly radial direction.

' The outer sheath or casing 20 may be made of any suitable materialeither formed or molded. I

prefer to make the sheath of pyralyn, celluloid, hardrubber or similarplastic compound. The sheath 2!! is mounted on the tube ill bycementing, forcing, or in any otherdesired manner. The

inner opening of this sheath should preferably be of the same shape asthe outside of the tubular member ill. The outer contour of the sheathmay be polygonal as shown in the drawings, or cylindricai, or of anyother desired shape. The outer surface of the sheath may be smooth, orribbed,

\ fluted or otherwise fashioned. I prefer, however,

to apply various scales to the smooth faces of the exterior of thesheath as shown at 2!, for use of engineers and draftsmen. Othersuitable inscriptions such as decimal tables, interest tables, etc., maybe imprinted for other professions as will be understood, or thesesurfaces may be used for advertising purposes.

y In assembling the pencil in the holder it necessary to axially alinethe pencil with the tube and to rotate the pencil so as to angularlyaline the faces 5 with the bottoms it of the inwardly extendingtransverse teeth i2. The pencil may then be inserted in the holder andthe upper portion thereof moved past the projections until the desiredlength of the pencil remains outside of the holder. ,The position of thepencil relatively to the inwardly extending projections l2 and i3 inFigures 12, 13 and 16; The scale of the draw-' ings being verysubstantially. enlarged in Figures 9 to 16 inclusive, it-will beunderstood that the inwardly projecting teeth are relatively narrow andpractically constitute knife edges andjor this reason the resistance tothe rotation of the pencil caused by the teeth I2 is not excessive.

It will also be apparent from Figures 12 and 13 that the pencil is nowpositively locked against axial movement relatively to the holder, dueto the interlocking of the teeth i2 in the recesses- 9. It will beunderstood that the passing of the ridges of the pencil in engagementwith the bottoms of the teeth I! will cause a slight outward distentionof the tube as shown at II in Figures 12 and 13.

The continued rotation of the pencil in'a clockwise directionbrings'portions of the pencil adjacent the ridges in engagement with thelongitudinally extending inwardly projecting tongues l3 whicheflectively serve as stops ,or abutments to prevent or'arrest thefurther 'rotation of the pencil in the clockwise direction. It will beapparent that this additional rotation from the position shown inFigures 12 and 13 to the arrested. position of the pencil shown inFigures 15 and 16 does not cause the release of the recesses 9 from thetransverse teeth l2.v When the pencil reaches the arrested position, theoutward distention i1 retracts due to the passage of the high points orridges of the pencils beyond the innermost point of the bottoms it ofthe teeth It. It will also be understood that the resilience and theresistance of the tube to distend will efiective ly prevent-theinadvertent counterclockwise rotation of the pencil in use and theconsequent undesired release of the pencil. It will also' be apparentthat the resilience of the wood will cause 25 I It will be apparent thatthe gripping engagement of the holder on the pencil is such astopositively prevent axial movement of thepencil in the holder duringall reasonable uses of the pencil and also that the gripping engagementwill positively prevent the rotation of the pencil in one direction andwill prevent the rotation of the-pencil in the other direction by asubstantial frictional and elastic resistance. It will also be apparentthat this pencil will not become shifted or rotated when sharpened on amechanical sharpener as the usual right hand rotational effeet will onlyserve to more tightly abut the ridges 4 against the longitudinal tonguesid.

The snug fit of the pencil in the here it of the tubular member holderin which the ridges of the pencil practically contact the bore of thetube on all sides, as clearly shown in Fig. 8, result in providing avery firm engagement of the pencil in the holder which is free from thelooseness and flexure which is frequently found in holders.

The eraser 6 being provided with' a pencil end extension 8 is mounted inthe holder in the same manner as explained above for the pencil except ithat, for the sake of conforming to usual custom,

the arrangement of inwardly projecting teeth and longitudinal tonguesis. made opposite hand from that shown at the right end of the holder inFigures 1 to 3 in order that the eraser may be locked in the holder bythe usual right hand rotation.

A great many types of holders may be provided including this inventionand I illustrate in Fig. 4 only one such modification. In thismodification, 30 indicates a tubular member in which is mounteda-pencilsimilar to the pencil I. This tubular member is provld'ed'withtransverse indentations 3i and longitudinal indentations 32, bothat theright end of the tube as viewed in the drawings and this tube is closedat the left end as shown at 33. In-this modified-form the outer sheathor casing is entirely omitted for the sake of simplification andeconomy. In order to compensate for the stiffness afforded by the casing20 in the first described modification,

I make the tube 30 of slightly thicker material,

as will be understood. outer. surface of the tube 30 may be finished bycorrugating, knurling, or otherwise finishing to provide a frictionsurface, if desired. v

Another adaption of this invention is illus-,- trated in Fig. in whichthis improved gripping device is shown associated with a usualinexpensive type of drafting compass 4|. This drafting compass 40 isshown as having the usual arms 41 and 42, the arm 4| being formed with acenter point liandthe arm, 42 being iormed with-a substantially tubularmember 44 provided with transverse indentations ll and longitudinalindentations 48. The interior construction of the inward projections inthe tube portion 44 is substantially identical with that previouslydescribed, and the mounting of the pencil is eflected in the same manneras in the preferred adaptation.

vertical pressure is usually exerted on the pencil which frequentlycauses the pencil, in compasses of this type with which I am familiar,to slip in the holding sleeve.

In many compasses also, in order to overcome this difilculty, clumsyscrew devices are provided which constitute an obstructime to adjust.

tion in the use of the compass and require much It will be evident thatthe present invention discloses a simple and yet eii'ec- 'tive devicefor preventing endwise movement the pencil in its holderand which at thetime permits the easy removal of the pencil from the compass for thepurpose of sharpening, and likewise'makespossible the easy axiallyshifting of the pencil to compensate for the wear of the point.

The forms of this invention described above,

" all include two series of transverse gripping teeth, each seriesconsisting of six inwardly projecting teeth l2, this being the number ofthe sides of the pencil shown. All of the teeth in one series arelocated in the same transverse plane and thetwo series are spaced fromeach other lbngitudinally by a substantial distance.

The longitudinal inwardly projecting tongues I: are six in number, alsocorresponding with the number of ridges on the hexagonal pencil shown,and are positioned so as to intersect the transverse teeth l2 and are,in fact, of a length greater than the space between the two series of Itis notessential, for instance, thattwo series i of teeth l2 be provided,as one series is very satisfactory. It is also not necessary that thenumber of teeth be the same as the number of sides or ridges of thepencil, as it is entirely practical to provide teeth to grip only a fewof the ridges, without sacrificing the emcacy of this device. It will beunderstod, however, that the firmness of grip and the resistance toaxial shifting will increase directly with the number of transverseteeth engaging the pencil.

In any event, I prefer to use a number vof teeth which is a multiple ofthe total number of ridges on the pencil for the purpose of securing abalanced arrangement of stresses.

The longitudinal tongues likewise need not nec In compasses of this typea direct endwiseessarily be the same in number as the number of ridgeson the pencil. Essentially it is necessary only to provide one suchtongue which will engage one of the ridges, that being suilicient toarrest the rotation of the pencil in the holder. For the sake ofbalancing the conditions, however,

I prefer to employ a plurality of these tongues illustrated in Fig. 7 inwhich a tubular member.

50 is shown having three transverse inward projections or teeth ii andin which three longitudinal tongues 52 are shown, the three tonguesbeing spaced a short distance longitudinally from the teeth 5!. in thesame transverse plane it is understood While the teeth 5| are all shown25 that this is not obligatory, as the teeth might be disposed indiiierent planes relatively to each other without affecting thepracticability of the holder. I

' The inwardly projecting teeth in the formsof the invention thus fardescribed all have inner edges which are substantially chords across thebore of the holder. In the broader aspects of this invention it is notessential that these teeth be in the form of segmental walls or finsacross the bore. It is necessary only that the teeth project asuiiicient distance inwardly to be adapted to form a recess or groove inthe projecting portions of the pencil whenthe, pencil is rotated andthat these teeth remain in these recesses when the rotation ofthe pencilhas been arrested by the longitudinal stops. The bottoms of the teethmay have any desired contour within the limits just mentioned. For thepurpose of illustrating one other form of teeth I have shown,

in Fig. 17, a tube 60 provided with teeth 6| which are considerably lessin transverse extent than the teeth l2, which effectively lock thepencil axially and which are positioned relatively to the lm gitudinaltongues 82 so that the teeth 6| prevent axial movement of the pencilwhen the ridges of the pencil engage the tongues 62.

The tubular member II in the embodiments illustrated is shown as formedfrom" a metallic tube. It will be understood that this tubular membermay have any des ed exterior shape and thatit may be formed 0 any othermaterial sure of the teeth I 2 inthe recesses 9 formed in the ridges Iof the pencil, thus preventingthe inadvertent loosening of the pencil.It is also feasible to form the inwardly extending projections byimbedding these projections, or a collar 1' aoaaa o includingtheprojections, inanytype of'jplastic moldedmaterial thereby securingthedesirable wearing qualities of the projections in a. molded or die castholder.

- In its broader aspects'it is not essential that a continuous circularbore be provided to receive the pencil. Aiseries of spaced supports forthe pencil would be theequivalent of the circular bore. A plurality ofsets of spaced teeth or knife edges I2, such as those shown, without anycircular bore would also effect the same purpose of preventing holder.

The pencil is illustrated as hexagonal. This invention is not limited tothe use of a hexagonal pencil and the pencil sheath might be octagonal,square, triangular, or have any other suitable number of sides, in whichcase the gripping means I in the holder would have to be correspondinglyforth whether or not altered as will be understood. Faces of the sheathof the pencilmight also be slightly concave instead of plane.

As will be understood, any other suitable type of eraser may beconveniently mounted into the upper end of the lengthener in place ofthat shown, as the conformation'of the inwardly directed projectionisadapted to firmly grip many forms of standard erasers.

Many other modifications of this invention and its application willnaturally occur to those skilled in this art, and the presentdisclosures should therefore be considered as typical only, and I desirenot to be limited to the exact construction shown and described.

I also desire to point out that the novel structure set forth in theclaims may be used either as a-separate holder or lengthener to aid inthe manual gripping of the pencil, or the structures set forth in theclaims may be used in association with or in combination with any otherauxiliary device such, for instance, as the compass illustrated in Fig.5, and. no claims are appended to include combinations of these improvedholders with these auxiliary devices, as such claims would constituteaggregations only and would therefor be informal. The claims areaccordingly intended to. cover the pencil holding structures set theyare associated with other devices. I

What I claim is: 1. A pencil holder having a generally tubular bodyformed with a relatively narrow inwardly cluding a tubular portion whoseinside diameter is substantially the same as the diameter of the ridgesof the pencil, a transverse indentation in the wall of the tubularportion and a longitudinal indentation in the tubular portion, thelength of the longitudinal indentation being substantially greater thanthe longitudinal dimension of the transverse indentation.

4. A pencil lengthener for holding polygonal pencils having a generallytubular opemng adapted toreceive the pencil and having inwardlyprojecting transverse-fins, adapted, upon rotation of free lateralmovement in the the bore and a relatively narrow inwardly prof" jectingtongue disposed longitudinally of the bore,

verse circle of the tube and the longitudinal pencils including a.geri'erally tubular -member vcil, to resiliently distort the tubularmember, and

ridges of the pencil, whereby the pencil is prevented from' moving;axially, and said opening having inwardly projecting. shoulder meansadapted to engage one of the ridges of the pen- 5 oil when said fins areimbedded in said ridges,

' whereby the rotation of the pencil is arrested.

5. A pencil'lengthener for holding polygonal pencils formed with aplurality of ridges; and

plane faces, said lengthener having a generally lil tubular bore andbeing provided with means adapted, upon rotation of the pencil,fori'ormingindentations in the ridges of the pencil, positive meansfor,ar-resting the rotation of thepencil in one direction, and frictionmeans'tending to re- 5 tard the rotation of the pencil in. the oppositedirection. r j

6. A pencil lengthener for holding polygonal pencils with plane, facesand ridges, having a generally cylindrical bore of substantially thesame diameter as the circle-circumscribed about the poly onal pencil andprovided with a plurality of inwardly projecting spaced transverseteeth, the inner edges of said teeth being angularly positioned tocontact a plurality of-spaced faces of said pencil and adapted, uponrotation of the pencil, to form recesses in the ridges of the pencil.

7. A pencil lengthener for holding polygonal pencils, having a generallytubular bore and hav- 30 mg a plurality of spaced indentationsprojecting into said bore and adapted to substantially contact the planefacesof said polygonal pencil and adapted, upon rotation of the pencil,to form recesses in the ridges of the pencil, some of said 35indentations being located in one transverse,

plane of the tubular member,- and other of said indentations beinglocated in a transverse plane spaced from the first named transverseplane;

and means adapted to arrest the rotation of said 4 pencil in onedirection. a a

8. A pencil holder for holding polygonal pencils, having a generallytubular body with an opening of substantially the same inside diameteras the diameter of the circle circumscribed about the polygonal pencil,and formed with an inwardly projecting transverse tooth and with aninwardly projecting longitudinally extending tongue, said longitudinallyextending tongue being located in an axial plane passing thru saidtransverse tongue adjacent one end thereof.

9. A pencil holder having a generally cylindrical bore formed with arelatively narrow .inwardly projecting tooth disposed transversely ofsaid longitudinal tongue and said transverse tooth intersecting eachother, the bottom of said transverse tooth forming a chord of thetranstongue extending substantially to the bottom of .the transversetooth.

10. A pencil lengthener for holding polygonal made of resilientmaterial, said tubular member being formed "with inwardly projectingtransverse indentationsadapted to. substantially contact the plane facesof said polygonal penc and adapted, when engaged by the ridges 01 therotating penbeing formed with inwardly ojecting shoulder indentationsadapted to abut e ridges of the pencil, and a casing enclosing saidtubular mem-.-

ber whereby said indentations are concealed and 75 the pencil, to formtransverse grooves in the pencils, having a generally tubular bodyformed of relatively resilient material, said body being whereby theresilience of said tubular member is reinforced.

11. A pencil lengthener for holding polygonal pencils having a generallytubular body formed of relatively resilient material, said body beingformed interiorly with an inwardly projecting transverse tooth whosebottom forms an edge substantially equal in length to the width of oneof the faces of the pencil, said tooth being adapted, upon rotation ofthe pencil, to be sprung outwardly by the. engagement of the rotating.ridges of the pencil with the bottom of the tooth,

whereby the tooth exerts a resilient pressure against the ridges of thepencil.

12. A pencil lengthener for holding polygonal one direction and wherebythe rotation of the pencil is positively arrested in the otherdirection.

13. A pencil holder for holding a polygonal pencil, having a boreadapted to receive the pencil and formed with inwardly projecting spacedteeth adapted, upon rotation of the pencil, to form recesses in theridges of the pencil and means adapted to arrest the rotation of thepencil,

said means being located to arrest said rotation when the teeth areimbedded in said recesses.

14. A pencil holder for holding polygonal pencils formed with aplurality of ridges and plane iaces, said holder including a generallytubular bore provided with means longitudinally fixed relatively to theholder and adapted, upon rotation of the pencil, to form indentations inthe ridges of the pencil, and means for arresting the rotation of thepencil before the periphery of the.

pencil has advanced a distance equal to the width of the one face of thepencil.

15. A pencil holder for holding polygonal pencils, having a generallycylindrical bore, andformed with a plurality of transverse inwardlyprojecting teeth whose inner portions form chords across the bore andwhich are adapted, upon rotation of the pencil, to cut progressivelydeeper indentations in the ridges of the pencil as the ridges intersectthe teeth, and pencil positioning means adapted to engage one of theridges of the pencil for arresting the rotation of the pencilbefore theridges reach the ends of the chord forming teeth.

16. A pencil holder having a generally'tubul'ar body formed with acylindrical bore provided with a transverse inwardly directed tooth, theinner edge of said tooth forming a chord extending in a substantiallystraight line interiorly across the bore of the tubular body, the endsof said chordal inner edge intersecting the wall of the body.

17. A pencil holder ior'holding polygonalipencils having substantiallyflat facesand ridges,

said holder being provided with a generally tubuwhose, inner edge formsa chord across the bore portion, the length of said inner edge beingsubstantially equal to the width of one of said flat faces and saidinner edge being adapted, upon rotation of the pencil in the holder, toform a progressively deepening groove in one of the ridges of the pencilas the pencil is rotated, whereby the pencil is prevented from movingaxially in the holder when the fin is imbedded in the ridge of thepencil.

18. A pencil holder for holding polygonal pencils having substantiallyflat faces and ridges. said holder being formed with a bore whosediameter is substantially the same as the diameter of the ridges oi. thepencil, and is providedvwith a plurality of circumferentially spacedinwardly projecting transverse iins formed with substantially straightinner edges intersecting the wall' of the bore at their ends, said inneredges being of a length substantially equal to the width of one of theflat faces of the pencil and bein adapted upon rotation of the pencil,to form transverse grooves in the ridges of the pencil, whereby thepencil is prevented rrom moving axially when the fins are imbedded in te ridges of the pencil. I JAMES; P; KUSA.

